TransparentDock 2 is an application that allows customization of the Mac OS X dock. The transparency level of the dock is fully adjustable, from fully transparent to fully opaque, or somewhere in between.

An assortment of options are available to enhance the appearance & functionality of the dock, and each can be applied independently, or combined into a theme.

A fully customizeable palette allows saving & switching between an unlimited number of custom dock themes. As always, built-in reset options allow returning the dock to its original state.